/* pk7_asn.c */

/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

 * project 2000.

 */

/* ====================================================================

 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer. 

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <stdio.h>

#include "cryptlib.h"

#include <openssl/asn1t.h>

#include <openssl/pkcs7.h>

#include <openssl/x509.h>

/* PKCS#7 ASN1 module */

/* This is the ANY DEFINED BY table for the top level PKCS#7 structure */

ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);

ASN1_ADB(PKCS7) = {

	ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),

	ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),

	ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),

	ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),

	ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),

	ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))

} ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);

ASN1_NDEF_SEQUENCE(PKCS7) = {

	ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),

	ASN1_ADB_OBJECT(PKCS7)

}ASN1_NDEF_SEQUENCE_END(PKCS7)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7)

IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)

IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)

ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {

	ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),

	ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),

	ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),

	ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),

	ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),

	ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)

} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)

/* Minor tweak to operation: free up EVP_PKEY */

static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)

{

	if(operation == ASN1_OP_FREE_POST) {

		PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;

		EVP_PKEY_free(si->pkey);

	}

	return 1;

}

ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {

	ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),

	ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),

	ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),

	/* NB this should be a SET OF but we use a SEQUENCE OF so the

	 * original order * is retained when the structure is reencoded.

	 * Since the attributes are implicitly tagged this will not affect

	 * the encoding.

	 */

	ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),

	ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),

	ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),

	ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)

} ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)

ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {

	ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),

	ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)

} ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)

ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {

	ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),

	ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),

	ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)

} ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)

/* Minor tweak to operation: free up X509 */

static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)

{

	if(operation == ASN1_OP_FREE_POST) {

		PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;

		X509_free(ri->cert);

	}

	return 1;

}

ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {

	ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),

	ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),

	ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),

	ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)

} ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)

ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {

	ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),

	ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),

	ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING, 0)

} ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)

ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {

	ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),

	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),

	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),

	ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),

	ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),

	ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),

	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)

} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)

ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {

	ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),

	ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)

} ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)

ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {

	ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),

	ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),

	ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),

	ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)

} ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)

IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)

/* Specials for authenticated attributes */

/* When signing attributes we want to reorder them to match the sorted

 * encoding.

 */

ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) = 

	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)

ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)

/* When verifying attributes we need to use the received order. So 

 * we use SEQUENCE OF and tag it to SET OF

 */

ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) = 

	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,

				V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)

ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)